linux-kernel - [PATCH 30/87] pci: ngene: remove memset after pci_alloc

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Date:   Fri, 28 Jun 2019 01:38:22 +0800
From:   Fuqian Huang <huangfq.daxian@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Fuqian Huang <huangfq.daxian@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Allison Randal <allison@...utok.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Enrico Weigelt <info@...ux.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 30/87] pci: ngene: remove memset after pci_alloc_consistent in ngene-core.c

pci_alloc_consistent calls dma_alloc_coherent directly.
In commit af7ddd8a627c
("Merge tag 'dma-mapping-4.21' of git://git.infradead.org/users/hch/dma-mapping"),
dma_alloc_coherent has already zeroed the memory.
So memset is not needed.

Signed-off-by: Fuqian Huang <huangfq.daxian@...il.com>
---
 drivers/media/pci/ngene/ngene-core.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/media/pci/ngene/ngene-core.c b/drivers/media/pci/ngene/ngene-core.c
index b75ab7d29226..af15ca1c501b 100644
--- a/drivers/media/pci/ngene/ngene-core.c
+++ b/drivers/media/pci/ngene/ngene-core.c
@@ -854,8 +854,6 @@ static int create_ring_buffer(struct pci_dev *pci_dev,
 	if (!Head)
 		return -ENOMEM;
 
-	memset(Head, 0, MemSize);
-
 	PARingBufferCur = PARingBufferHead;
 	Cur = Head;
 
@@ -907,8 +905,6 @@ static int AllocateRingBuffers(struct pci_dev *pci_dev,
 	if (SCListMem == NULL)
 		return -ENOMEM;
 
-	memset(SCListMem, 0, SCListMemSize);
-
 	pRingBuffer->SCListMem = SCListMem;
 	pRingBuffer->PASCListMem = PASCListMem;
 	pRingBuffer->SCListMemSize = SCListMemSize;
-- 
2.11.0